diff --git a/mingw-w64-headers/include/dwrite_1.h b/mingw-w64-headers/include/dwrite_1.h
new file mode 100644
index 0000000..1630881
--- /dev/null
+++ b/mingw-w64-headers/include/dwrite_1.h
@@ -0,0 +1,148 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#ifndef DWRITE_1_H_INCLUDED
+#define DWRITE_1_H_INCLUDED
+
+#include <dwrite.h>
+
+enum DWRITE_OUTLINE_THRESHOLD {
+    DWRITE_OUTLINE_THRESHOLD_ANTIALIASED,
+    DWRITE_OUTLINE_THRESHOLD_ALIASED
+};
+
+struct DWRITE_CARET_METRICS {
+    INT16 slopeRise;
+    INT16 slopeRun;
+    INT16 offset;
+};
+
+struct DWRITE_UNICODE_RANGE {
+    UINT32 first;
+    UINT32 last;
+};
+
+struct DWRITE_FONT_METRICS1 : public DWRITE_FONT_METRICS {
+    INT16 glyphBoxLeft;
+    INT16 glyphBoxTop;
+    INT16 glyphBoxRight;
+    INT16 glyphBoxBottom;
+    INT16 subscriptPositionX;
+    INT16 subscriptPositionY;
+    INT16 subscriptSizeX;
+    INT16 subscriptSizeY;
+    INT16 superscriptPositionX;
+    INT16 superscriptPositionY;
+    INT16 superscriptSizeX;
+    INT16 superscriptSizeY;
+    BOOL hasTypographicMetrics;
+};
+
+#undef  INTERFACE
+#define INTERFACE IDWriteFontCollection
+DECLARE_INTERFACE_(IDWriteFontFace1, IDWriteFontFace)
+{
+    BEGIN_INTERFACE
+
+#ifndef __cplusplus
+    /* IUnknown methods */
+    STDMETHOD(QueryInterface)(THIS_ REFIID riid, void **ppvObject) PURE;
+    STDMETHOD_(ULONG, AddRef)(THIS) PURE;
+    STDMETHOD_(ULONG, Release)(THIS) PURE;
+
+    /* IDWriteFontFace methods */
+    STDMETHOD_(DWRITE_FONT_FACE_TYPE, GetType)(THIS) PURE;
+
+    STDMETHOD(GetFiles)(THIS_
+        UINT32 *numberOfFiles,
+        IDWriteFontFile **fontFiles) PURE;
+
+    STDMETHOD_(UINT32, GetIndex)(THIS) PURE;
+    STDMETHOD_(DWRITE_FONT_SIMULATIONS, GetSimulations)(THIS) PURE;
+    STDMETHOD_(WINBOOL, IsSymbolFont)(THIS) PURE;
+
+    STDMETHOD_(void, GetMetrics)(THIS_
+        DWRITE_FONT_METRICS *fontFaceMetrics) PURE;
+
+    STDMETHOD_(UINT16, GetGlyphCount)(THIS) PURE;
+
+    STDMETHOD(GetDesignGlyphMetrics)(THIS_
+        UINT16 const *glyphIndices,
+        UINT32 glyphCount,
+        DWRITE_GLYPH_METRICS *glyphMetrics,
+        WINBOOL isSideways __MINGW_DEF_ARG_VAL(FALSE)) PURE;
+
+    STDMETHOD(GetGlyphIndices)(THIS_
+        UINT32 const *codePoints,
+        UINT32 codePointCount,
+        UINT16 *glyphIndices) PURE;
+
+    STDMETHOD(TryGetFontTable)(THIS_
+        UINT32 openTypeTableTag,
+        const void **tableData,
+        UINT32 *tableSize,
+        void **tableContext,
+        WINBOOL *exists) PURE;
+
+    STDMETHOD_(void, ReleaseFontTable)(THIS_
+        void *tableContext) PURE;
+
+    STDMETHOD(GetGlyphRunOutline)(THIS_
+        FLOAT emSize,
+        UINT16 const *glyphIndices,
+        FLOAT const *glyphAdvances,
+        DWRITE_GLYPH_OFFSET const *glyphOffsets,
+        UINT32 glyphCount,
+        WINBOOL isSideways,
+        WINBOOL isRightToLeft,
+        IDWriteGeometrySink *geometrySink) PURE;
+
+    STDMETHOD(GetRecommendedRenderingMode)(THIS_
+        FLOAT emSize,
+        FLOAT pixelsPerDip,
+        DWRITE_MEASURING_MODE measuringMode,
+        IDWriteRenderingParams *renderingParams,
+        DWRITE_RENDERING_MODE *renderingMode) PURE;
+
+    STDMETHOD(GetGdiCompatibleMetrics)(THIS_
+        FLOAT emSize,
+        FLOAT pixelsPerDip,
+        DWRITE_MATRIX const *transform,
+        DWRITE_FONT_METRICS *fontFaceMetrics) PURE;
+
+
+    STDMETHOD(GetGdiCompatibleGlyphMetrics)(THIS_
+        FLOAT emSize,
+        FLOAT pixelsPerDip,
+        DWRITE_MATRIX const *transform,
+        WINBOOL useGdiNatural,
+        UINT16 const *glyphIndices,
+        UINT32 glyphCount,
+        DWRITE_GLYPH_METRICS *glyphMetrics,
+        WINBOOL isSideways __MINGW_DEF_ARG_VAL(FALSE)) PURE;
+#endif
+
+    /* IDWriteFontFace1 methods */
+    STDMETHOD_(void, GetMetrics)(THIS_ DWRITE_FONT_METRICS*) PURE;
+    STDMETHOD(GetGdiCompatibleMetrics)(THIS_ FLOAT,FLOAT,DWRITE_MATRIX const*,DWRITE_FONT_METRICS1*) PURE;
+    STDMETHOD_(void, GetCaretMetrics)(THIS_ DWRITE_CARET_METRICS*) PURE;
+    STDMETHOD(GetUnicodeRanges)(THIS_ UINT32, DWRITE_UNICODE_RANGE*,UINT32*) PURE;
+    STDMETHOD_(BOOL, IsMonospacedFont)(THIS) PURE;
+    STDMETHOD(GetDesignGlyphAdvances)(THIS_ UINT32,UINT16 const*,INT32*,BOOL isSideways __MINGW_DEF_ARG_VAL(FALSE)) PURE;
+    STDMETHOD(GetGdiCompatibleGlyphAdvances)(THIS_ FLOAT,FLOAT,DWRITE_MATRIX const*,BOOL,BOOL,UINT32,
+            UINT16 const*,INT32*) PURE;
+    STDMETHOD(GetKerningPairAdjustments)(THIS_ UINT32,UINT16 const*,INT32*) PURE;
+    STDMETHOD_(BOOL, HasKerningPairs)(THIS);
+    STDMETHOD(GetRecommendedRenderingMode)(FLOAT,FLOAT,FLOAT,DWRITE_MATRIX const*,BOOL,
+            DWRITE_OUTLINE_THRESHOLD,DWRITE_MEASURING_MODE,DWRITE_RENDERING_MODE*) PURE;
+    STDMETHOD(GetVerticalGlyphVariants)(THIS_ UINT32,UINT16 const*,UINT16*);
+    STDMETHOD_(BOOL, HasVerticalGlyphVariants)(THIS);
+};
+
+__CRT_UUID_DECL(IDWriteFontFace1, 0xa71efdb4,0x9fdb,0x4838,0xad,0x90,0xcf,0xc3,0xbe,0x8c,0x3d,0xaf);
+
+
+#endif /* DWRITE_1_H_INCLUDED */